I have a running total for a particular month for our ad spend (marketing). I update this number daily, but I do not enter it for each day, rather I just update it each day in one cell. For instance, on the 1st I could have spent $100 and on the second I update that to $120...etc. I am creating a dashboard for daily spend and I need to have a formula that will update this average as the days go by. For instance, if the daily spend it $200 on the 5th, the average per day would be $40, but if it is also $200 the next day then the average changes based on the day of the month. How on earth do I accomplish this if it is even possible. I am using Google Sheets.
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